/*
 * The contents of this web application are subject to the Mozilla Public License Version 
 * 1.1 (the "License"); you may not use this web application except in compliance with 
 * the License. You may obtain a copy of the License at http://www.mozilla.org/MPL/.
 * 
 * Software distributed under the License is distributed on an "AS IS" basis, 
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
 * for the specific language governing rights and limitations under the License.
 * 
 * The Original Code is owned by and the Initial Developer of the Original Code is 
 * Composite A/S (Danish business reg.no. 21744409). All Rights Reserved
 * 
 * Section 11 of the License is EXPRESSLY amended to include a provision stating 
 * that any dispute, including but not limited to disputes related to the enforcement 
 * of the License, to which Composite A/S as owner of the Original Code, as Initial 
 * Developer or in any other role, becomes a part to shall be governed by Danish law 
 * and be initiated before the Copenhagen City Court ("K�benhavns Byret")            
 */

using System.Collections.Generic;
using System.IO;
using System.Xml;
using System.Xml.Linq;
using Composite.Core.IO;
using Composite.Core.Xml;
using Composite.Functions;
using Composite.Plugins.Functions.FunctionProviders.StandardFunctionProvider.Foundation;


namespace Composite.Plugins.Functions.FunctionProviders.StandardFunctionProvider.Xml
{
    internal sealed class LoadXhtmlFileFunction : StandardFunctionBase
    {
        public LoadXhtmlFileFunction(EntityTokenFactory entityTokenFactory)
            : base("LoadXhtmlFile", "Composite.Xml", typeof(XhtmlDocument), entityTokenFactory)
        {
        }

        public override object Execute(ParameterList parameters, FunctionContextContainer context)
        {
            string relativePath = parameters.GetParameter<string>("RelativePath");

            string path = Path.Combine(PathUtil.Resolve("~"), relativePath);
            if (!C1File.Exists(path))
            {
                throw new FileNotFoundException("File not found. Ensure path is relative (that it does not start with '/').", path);
            }

            using (var streamReader = new C1StreamReader(path))
            {
                using (var reader = XmlReader.Create(streamReader))
                {
                    return new XhtmlDocument(XDocument.Load(reader));
                }
            }
        }

        protected override IEnumerable<StandardFunctionParameterProfile> StandardFunctionParameterProfiles
        {
            get
            {
                WidgetFunctionProvider textboxWidget = StandardWidgetFunctions.TextBoxWidget;

                yield return new StandardFunctionParameterProfile(
                    "RelativePath", typeof(string), true, new NoValueValueProvider(), textboxWidget);
            }
        }
    }
}
